How can I get more wireless headsets for my Jeep commander?

My kids keep breaking the wireless headsets in my Jeep, is there a way to get more? And can I get after market ones at a cheaper cost?|||pls go to website and clich on motor part or car parts there you will find some thing www.shopforbargains.info|||I see after market head sets in Nissan Vans E-Bay and electronics stores. Take the broken head sets out of your kids Money. Let them buy then if they want to hear. That way they won't use them to hang there kid sister.